python3: bump to 3.4.2

This commit bumps python3 to Python 3.4.2. Two patches had to be
changed slightly to fix some minor conflicts.

PYTHON3_LIBTOOL_PATH = NO was added to prevent Buildroot from trying
to patch a version of libtool for which we don't have matching
patches, which isn't a problem since we're anyway not using the part
of the Python sources that uses libtool (it's the built-in copy of
libffi, and we use the external libffi).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

package/python3/python3-106-optional-expat.patch

@@ -19,7 +19,7 @@ Index: b/Makefile.pre.in
 ===================================================================
 --- a/Makefile.pre.in
 +++ b/Makefile.pre.in
-@@ -1134,7 +1134,7 @@
+@@ -1149,7 +1149,7 @@
  		logging csv wsgiref urllib \
  		ctypes ctypes/macholib \
  		idlelib idlelib/Icons \
@@ -28,7 +28,7 @@ Index: b/Makefile.pre.in
  		importlib \
  		turtledemo \
  		multiprocessing multiprocessing/dummy \
-@@ -1206,6 +1206,10 @@
+@@ -1221,6 +1221,10 @@
  LIBSUBDIRS += curses
  endif
  
@@ -43,7 +43,7 @@ Index: b/configure.ac
 ===================================================================
 --- a/configure.ac
 +++ b/configure.ac
-@@ -2352,13 +2352,21 @@
+@@ -2369,13 +2369,21 @@
  AC_SUBST(DISABLED_EXTENSIONS)
  
  # Check for use of the system expat library
@@ -74,7 +74,7 @@ Index: b/setup.py
 ===================================================================
 --- a/setup.py
 +++ b/setup.py
-@@ -1417,7 +1417,7 @@
+@@ -1426,7 +1426,7 @@
          #
          # More information on Expat can be found at www.libexpat.org.
          #